Fairchild Semiconductor KA723, KA723D Datasheet
KA723
Precision Voltage Regulator
www.fairchildsemi.com
Features
• Positive or Negative Supply Operation
• 0.01% line and load regulation
• Output voltage adjustable from 2V to 37 V
• Output current to 150mA without external pass transistor
Internal Block Diagram
Description
The KA723 are monolithic integrated Circuit voltage regulators featuring high ripple rejection, excellent output and
load regulation, excellent temperature stability, and low
standby current. The KA723 are also useful in a wide range
of other applications such as a shunt regulator, a current regulator or a temperature controller.
14-DIP
1
14-SOP
1
TEMP.
COMPENS
ZENER
REF
AMP
©2000 Fairchild Semiconductor International
V
REF
+Vcc
12
4
67
NON
-Vcc
INVERT
INPUT
INVERT
INPUT
ERROR
AMP
5
5
CURRENT
LIMIT
FREQUENCY
COMPENS
12
3
CURRENT
SENSE
Vo
11
SERIES PASS
TRANSISTOR
Vo
9
Vz
Rev. 5.0
KA723
Absolute Maximum Ratings
Parameter Symbol Value Unit
Pulse Voltage from V+ to V- (50ms) V
Continuous Voltage from V+ to V- V
Input-Output Voltage Differential V
I
Maximum Output Current I
Differential Input Voltage V
Voltage Between Non-Inverting Input and V- V
Current from V
Current from V
Z
REF
I
REF
Power Dissipation P
Operating Temperature Range T
Storage Temperature Range T
OPR
STG
I(P)
I
- V
O
ID
IE
I
Z
D
O
50 V
40 V
40 V
150 mA
±5 V
8V
25 mA
15 mA
1000 mV
0 ~ +70 °C
-65 ~ + 150 °C
Electrical Characteristics
(Unless otherwise specified, TA = 25°C, VIN =V+= VC = 12V, V-=O,V
divider impedance as seen by error amplifier ≤10KΩ connected as shown in figure 1)
= 5V, IL =1mA, R
OUT
= 0, CI = 100pF, C
SC
PEAK
REF
=0 and
Parameter Symbol Conditions Min Typ. Max. Unit
Line Regulation
Load Regulation
∆V
∆V
Ripple Rejection dB
Average Temperature Coefficient of
Output Voltage
Short Circuit Current Limit I
Reference Voltage V
∆V
O
SC
REF
Output Noise Voltage V
VI = 12V to 15V
V
= 12V to 40V
O
I
T
MIN ≤TA≤TMAX
VI = 12V to 15V
= 1mA to 50mA - 0.03 0.2
I
O
T
≤T≤T
MIN
O
IO = 1 to 50mA
f = 100Hz to 10KHz,C
f = 100Hz to 10KHz,C
/∆TT
MIN
≤T≤T
MAX
MAX
=0 - 74 -
REF
=5µF- 86 -
REF
RSC = 10Ω, VO = 0 - 65 - mA
- 6.80 7.15 7.50 V
f = 100Hz to 10KHz, C
N
f = 100Hz to 10KHz, C
= 0 - 20 -
REF
=5µF- 2.5 -
REF
0.01
-
0.1
0.1
0.5
--0.3
--0.6
- 0.003 0.015 %/°C
Long-term Stability ST - - 0.1 Standby Current Drain I
Input Voltage Range V
Output Voltage Range V
Input-Output Voltage Differential V
IL = 0, VI = 30V - 2.0 4.0 mA
D
I
O
D
-9.5-40V
-2.0-37V
-3.0-38V
%
%
dB
µVms
%/
1000HR
Notes:
1.Line and load regulation specifications are given for the condition of constant chip temperature.
2.Temperature drifts must be taken into account separately for hith dissipation conditions.
2
Typical Application
Figure 1. Basic Low Voltage Regulator
(V
= 2 to 7Volts)
OUT
KA723
R3
R1R2
--------------------- -=
R1 R2+
Note: for minimum temperature drift
Typical Performance
Regulated Output Voltage 5V
Line regulation ( ∆V
Load Regulation ( ∆V
= 3V ) 0.5mV
IN
= 50V ) 1.5mV
L
3
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